class PythonStudents:
    classnumber = '班级:1904'
    # classwhat = 'study'
    # what_beforeclass = 'handup_mobile'
    # what_afterclass = 'go to eat'
    def __init__(self,name,age):
        self.name = name
        self.age = age
    def heshui(self):
        print('喝水..........')

    @classmethod
    def classwhat(cls):
        print('classwhat : study')
    @classmethod
    def what_beforeclass(cls):
        print('what_beforeclass : handup_mobile')
    @classmethod
    def what_afterclass(cls):
        print('what_afterclass : go to eat')
    @staticmethod
    def show():
        print('静态方法')
        print('是关于python\'s  student静\'s的一个类')

zhengjiahui = PythonStudents('郑佳慧',18)
chenhuan = PythonStudents('陈欢',17)
PythonStudents.heshui(chenhuan)
PythonStudents.classwhat()